Kill subprocesses on KeyboardInterrupt.

tests/gclient_utils_test.py

Index: tests/gclient_utils_test.py
diff --git a/tests/gclient_utils_test.py b/tests/gclient_utils_test.py
index 2703e5d955832e9201f5167e7d16ddd86c14e814..113114e65cf8f2e30d69a74a8d7501d613235a47 100755
--- a/tests/gclient_utils_test.py
+++ b/tests/gclient_utils_test.py
@@ -34,11 +34,11 @@ class GclientUtilsUnittest(GclientUtilBase):
         'GetGClientRootAndEntries', 'GetEditor', 'IsDateRevision',
         'MakeDateRevision', 'MakeFileAutoFlush', 'MakeFileAnnotated',
         'PathDifference', 'ParseCodereviewSettingsContent', 'NumLocalCpus',
-        'PrintableObject', 'RunEditor',
+        'PrintableObject', 'RunEditor', 'GClientChildrenSingleton',
         'SplitUrlRevision', 'SyntaxErrorToError', 'UpgradeToHttps', 'Wrapper',
         'WorkItem', 'codecs', 'lockedmethod', 'logging', 'os', 'Queue', 're',
         'rmtree', 'safe_makedirs', 'stat', 'subprocess', 'subprocess2', 'sys',
-        'tempfile', 'threading', 'time', 'urlparse',
+        'tempfile', 'threading', 'time', 'urlparse', 'KillAllRemainingChildren'
     ]
     # If this test fails, you should add the relevant test.
     self.compareMembers(gclient_utils, members)
@@ -49,6 +49,7 @@ class CheckCallAndFilterTestCase(GclientUtilBase):
   class ProcessIdMock(object):
     def __init__(self, test_string):
       self.stdout = StringIO.StringIO(test_string)
+      self.pid = 9284
     def wait(self):
       pass